<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <title>webkit-user-modify</title>
    <style>
        .z {
            -webkit-user-modify: read-write-plaintext-only;
        }

    </style>
</head>
<body>

<a class="z">acasdf</a>

<a contenteditable="true">xfds</a>
</body>
</html>